Novi, Mich. – Aug. 28, 2017 – Hino Motor Sales USA, a subsidiary of the Toyota Motor Corporation, has recalled dozes of industrial vehicles possibly equipped with improperly installed door bolts, according to documentation filed with the National Highway Transportation Safety Administration. The campaign affects 2018 NE8J, NJ8J and NV8J models. The automotive company believes 99 percent of the vehicles involved in the recall contain the defective parts.
The Defect
The models named in this latest campaign could be equipped with doors that feature upper hinges with loose bolts. This can cause the doors to function improperly and, in some cases, completely detach, creating a serious safety hazard for drivers and passengers. However, Hino has yet to receive any reports connecting the doors to accidents or injuries.
Timeline of Events
On June 13, 2017, the U.S. Hino assembly plant received prefabricated vehicle cabs from a supplier in Japan. Engineers immediately noticed structural issues with the doors on these fixtures and identified the root cause: misaligned door hinges. Roughly one month later, the vehicle manufacturer began an internal repair initiative aimed at the hinges on assembled vehicles. This process involved installing shoulder-less bolts, repositioning cab doors by hand and tightening the bolts with the appropriate amount of torque. On July 19, the company adopted an alternative workflow due to high repair backlog, moving to an assembly-line based process that included the installation of shoulder-less hinges, along with a manual door adjustment – using a wedge – and bolt tightening. This last step was carried out with the wedge in place to ensure door fit, according to internal documentation filed with the NHTSA.
On July 28, quality assurance personnel performed spot checks on vehicles with reinstalled doors and discovered assembly errors. Specifically, assembly and repair teams at the Hino production facility had failed to apply enough to torque when installing the hinge bolts, leaving them loose. Shipments were immediately halted. Over the next two days, engineers at the site repaired the vehicles with the amended door hinges by removing the hinges. On July 31, the Hino QA division elected to launch an official safety recall to address the issue.
The vehicle manufacturer has introduced new production processes designed to prevent additional errors.
The Solution
Hino has ordered dealers to tighten the door bolts on affected vehicles, free of charge. The automaker has not yet announced when it will contact owners, according to documents submitted to the NHTSA. Owners in need of more immediate assistance can contact Hino customer service at (248) 699-9300 or connect with the NHTSA Vehicle Safety Hotline at (888) 327-4236.
